Revieios — HulVs Sub-oceanic Lands 473 



XII. — The Discoveey of Fossils in the Jasper and Geeen Schist 

 Series of the Highland Border at Ceaigeven Bay, Stonehaven. 

 By Egbert Campbell, M.A., D.Sc. 



BETWEEN Craigeven Bay and GaiTon Point occurs a series o;f 

 crushed spilitic lavas with intercalated black shales, jaspers, and 

 cherts. In their lithological characters these resemble closely the green 

 igneous rocks and associated sediments which appear at intervals along 

 the line of the Highland Boundary fault, and which are shown on the 

 Geological Survey maps as of (?) Arenig age. In August, 1909, on the 

 occasion ot a visit to Craigeven Bay in company with Dr. B. N". Peach 

 and Dr. W. T. Gordon, we succeeded in finding in the black shales 

 several fossils, including a linguloid shell and a bivalve Phyllocarid 

 Crustacean, The assistance of Mr. D. Tait, of H.M. Geological Survey, 

 was obtained in making a detailed search in the fossiliferous beds. 

 Dr. Peach, to whom the fossils were submitted for determination, has 

 identified the following forms : Lingulella, Obolella, Acrotreta, Linnars- 

 sonia, and Siiihonotreta ; a bivalve Phyllocarid allied to Caryooaris 

 and Lingulocaris ; and cases of a tubicolar worm. The above genera 

 are most commonly found in the lowest division of the Lower Silurian 

 (Ordovician) system and in the Upper Cambrian. Dr. Peach, while 

 admitting that the exact horizon of the fossils is still a matter of 

 doubt, suggests that, since Graptolites are absent, they are more likely 

 to belong to the Upper Cambrian than to the Ordovician. Whatever 

 may be the ultimate decision as to their stratigraphical horizon thft 

 discovery of the above fossils leaves very little doubt that the boundary 

 fault series is not pre-Cambrian. ^ 



The (?) Upper Cambrian rocks at Craigeven Bay are separated frorp 

 the Dalradian Schists by a reversed fault, and are overlain uncon- 

 formably by Upper Silurian (Downtonian) strata. 



E-E^TIE^VsTS. 



I. — Monograph on the Sdb-oceanic Phtsiography of the North 

 Atlantic Ocean. By Edward Hull, M.A., LL.D., F.E.S. 

 AVith a chapter on the Sub-oceaDic Physical Features off the coast 

 of ISTorth America and the "West Indian Islands. By Professor 

 Joseph W. W. Spencer, M.A., Ph.D. Folio (18 by,12i inches); 

 pp. viii, 42, with 11 maps (9 coloured). London: Edward 

 Stanford, Long Acre, W.C., 1912. Price 21s. net (post free in 

 United Kingdom 21s. Id.). 



1!N" Professor Hull's Atlas of Maps with its accompanying text we 

 have a summary of the author's long- continued observations 

 and deductions concerning the eastern coast of the North Atlantic, and 

 his work is supplemented by that of his friend Professor J. W. Spencer 

 on the Atlantic coast of North America and the West Indian Islands. 

 It brings before the student a collection of facts on submarine coastal 

 features which, if not all new to us, are so ably put forward that they 

 cannot fail to attract the attention of a large class of persons interested 

 in the cartography of the British Islands, especially in their relation 

 to neighbouring lands, of which, at no distant period, they formed 

 a solid part. 



^ Abstract of paper read before the British Association, Section C (Geology), 

 Dundee, September, 1912. 



